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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Influência de extremos de cheia e de seca nos recursos capturados pela pesca comercial desembarcados no porto de Manaus (Amazonas, Brasil)

Guerreiro, Ana Isabel Camacho 15 February 2017 (has links)
Submitted by Gizele Lima (gizele.lima@inpa.gov.br) on 2017-08-08T20:21:36Z No. of bitstreams: 2 TESE_ANA GUERREIRO.pdf: 5312814 bytes, checksum: 5cda6e8ab1cf2cc13bd7d29aa20fff59 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2017-08-08T20:21:36Z (GMT). No. of bitstreams: 2 TESE_ANA GUERREIRO.pdf: 5312814 bytes, checksum: 5cda6e8ab1cf2cc13bd7d29aa20fff59 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-02-15 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / In this study, the fisher’s knowledge about extreme climatic events (drought and flood) as well as a time serie of fishery data from Amazonas River (1996-2005) colleted at the Manaus harbour was evaluated. The main objective of this thesis is to generate indicators based on the information colleted, in order to promote a better fisheries management. Fishers were able to perceive climatic extremes that occured among 1952-2012, and they were also able to recognize the impacts that they had on fisheries resources. The analysis of fishery data time series allowed identifying an increase in fishery mortality of flag-tail prochilodus Semaprochilodus insignis during climatic extremes whose anual mean diary temperature range was lowest. An increase in growth performance of S. insignis was observed during the most intense droughts, as well as a reduction in reproductive effort of Brycon cephalus and S. insignis was noted during the most intense floods. Some adequate management measures were discussed along the text. / Neste trabalho analisámos o conhecimento ecológico que os pescadores tem acerca de eventos climáticos extremos de seca e cheia bem como uma série temporal (1996-2005) de dados provenientes do rio Amazonas coletados no porto de Manaus. O objetivo da presente tese é gerar indicadores baseados na informação coletada de forma a subsidiar uma melhor gestão das pescas na Amazônia. Os pescadores conseguiram ter percepção de extremos climáticos que ocorreram entre 1952-2012, e também conseguiram identificar os impactos que os mesmos tiveram nos recursos. A série temporal de dados de captura analisados permitiram identificar um aumento da mortalidade por pesca de Jaraqui escama grossa Semaprochilodus insignis durante extremos cuja média anual da amplitude térmica diária foi menor, e também um aumento da performance de crescimento do Jaraqui escama-grossa quando as secas foram mais fortes e uma a redução do esforço reprodutivo de Brycon cephalus e Semaprochilodus insignis quando as cheias foram mais intensas. Algumas medidas de gestão adequadas aos resultados obtidos são debatidas.

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